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It isn’t time. Those wacky plans are put forward to simply carry on with oil.
This is why we’re in so much trouble. We have a whole civilisation built on fossil fuels, and no way of maintaining it without them, and their continued use will make the planet largely uninhabitable. The scary part is just how quickly this is happening, we simply won’t be able to produce enough food for everyone. -
Most of these are ideas that tech bros like as they can feel good about themselves for being saviours, not have to address thier lifestyle choices, can raise a bunch of venture capital for and all it achieves is kicking the can down the road and sustaining the status quo
One area currently getting some attention is the impact that reducing the sulphur in shipping fuel has had, turns out we had been inadvertently geoengineering and we now have some data on its potential impact
https://www.science.org/content/article/changing-clouds-unforeseen-test-geoengineering-fueling-record-ocean-warmth
There's been a fair bit of news about geoengineering in recent months. The EU and US both seem to be keen on serious talks with the rest of the world. https://rb.gy/vmdiw Projects for discussion include:
Perhaps it's time? If it's our last best hope, maybe we'll regret it if we don't try.
It sounds like something best left to the script of a disaster movie, but there are so many actual disasters happening around the world that reality is already as bad as a disaster movie for many people.